Calling an undeclared function is poor style in C (See this) and illegal in C++. So is passing arguments to a function using a declaration that doesn’t list argument types:
If we save the below program in a .c file and compile it, it works without any error. But, if we save the same in a .cpp file, it doesn’t compile.
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- NULL undeclared error in C/C++ and how to resolve it
- Difference between Call by Value and Call by Reference
- How to call function within function in C or C++
- A C/C++ Function Call Puzzle
- Is it possible to call constructor and destructor explicitly?
- dup() and dup2() Linux system call
- Order of Constructor/ Destructor Call in C++
- Wait System Call in C
- Accept system call
- pipe() System call
- How can I return multiple values from a function?
- Can we use function on left side of an expression in C and C++?
- Can we access private data members of a class without using a member or a friend function?
- What is Memory Leak? How can we avoid?
- What are Wild Pointers? How can we avoid?
- What are the operators that can be and cannot be overloaded in C++?
- Can we access global variable if there is a local variable with same name?
- Can references refer to invalid location in C++?
- Can static functions be virtual in C++?
- Can a C++ class have an object of self type?